Beverly, Did you see the 2/28/01 posting by Charles Guerena? It is titled "Info only re: Guerena". I'm not certain but I believe that is my uncle Chuck posting the information. You might find it interesting. I am interested if you Huerena's are related to us Guerena's?
We predominantly reside in Los Angeles and Orange County California. Our relatives came largely from Alamos in Sonora Mexico. My grandfather Carlos Guerena came to Los Angeles in about 1921. Our distant ancestry is Basque. As Charles notes there is a town of Guerena in the Basque region of Spain. Although he points out that it may have once been called Gerena (although reading here on geneology.com is the first I've heard of that).
There is some relationship within our family to Maria Felix Guerena. Maria Felix was born in Alamos Mexico and was/is a very famous Mexican actress. You can find many interesting videos of her on YouTube!